Malignant neoplasms of thyroid and other endocrine glands (C73-C75) ICD-10-CM
The C73–C75 section covers malignant neoplasms of thyroid and other endocrine glands with 23 ICD-10-CM diagnosis codes, of which 18 are billable in fiscal year 2026. The section is organized into the 3 code ranges listed below.
Code Ranges in This Section 3 ranges · 23 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| C73 | Malignant neoplasm of thyroid gland (C73) | 1 | 1 |
| C74 | Malignant neoplasm of adrenal gland (C74) | 13 | 9 |
| C75 | Malignant neoplasm of other endocrine glands and related structures (C75) | 9 | 8 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the C73–C75 Code Range
ICD-10 codes C73 to C75 identify various types of malignant tumors located in the thyroid and other endocrine glands, serving as key references for coding cancers of these specific organs.
Code C73 focuses on malignant neoplasms of the thyroid gland, covering many forms such as follicular thyroid carcinoma and the more aggressive anaplastic thyroid carcinoma. These include common terms like papillary thyroid carcinoma and medullary thyroid carcinoma, helping coders match diagnoses with precise subtypes. Codes in the C74 series cover malignant tumors of the adrenal gland, distinguishing between cancers in the cortex (e.g., adrenal cortical carcinoma) and medulla (e.g., malignant pheochromocytoma), and specifying sides when known. This range also includes neuroblastomas, which may metastasize to an adrenal gland. The C75 codes cover less common malignant tumors of other endocrine-related glands such as the parathyroid (parathyroid carcinoma), pituitary (pituitary carcinoma), pineal gland, carotid body, and aortic body. These codes aid in identifying primary malignancies in less frequently affected endocrine tissues or when multiple glands are involved.
Questions About This Page
How many codes are in the C73-C75 range?
The C73-C75 range contains 23 ICD-10-CM diagnosis codes in FY 2026. 18 of them are billable, and the rest are category headers that organize the section.
What conditions does C73-C75 cover?
The range covers malignant neoplasms of thyroid and other endocrine glands. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
